Hes7 3'UTR is required for somite segmentation function.

Hes7 3'UTR is required for somite segmentation function.
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DOI:
10.1038/srep06462
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发表时间:
2014-09-24
期刊:
影响因子:
4.6
通讯作者:
Bessho Y
Bessho Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Fujimuro T;Matsui T;Nitanda Y;Matta T;Sakumura Y;Saito M;Kohno K;Nakahata Y;Bessho Y

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一组基因在发育中的小鼠胚胎后端显示振荡表达,从而调节周期性的体块分割。虽然产生振荡的机制已被广泛阐明,但调控振荡周期的因素仍不清楚。在本研究中,我们试图通过增加Hes7转录的时间来延长振荡周期。我们制造了敲入小鼠,在Hes7 3'UTR中插入了一个大的内含子。外源内含子出乎意料地没有正确地剪接出来,转录本过早终止。因此,Hes7 mRNA失去了其3'UTR,从而减少了Hes7蛋白的数量。振荡在敲入胚胎中被抑制,周期性体分裂不正常发生。因此,我们证明了Hes7 3'UTR对于为协调周期性体体形成的体体分割时钟积累足够数量的Hes7蛋白至关重要。
A set of genes in the posterior end of developing mouse embryos shows oscillatory expression, thereby regulating periodic somite segmentation. Although the mechanism for generating oscillation has extensively been clarified, what regulates the oscillation period is still unclear. We attempted to elongate the oscillation period by increasing the time to transcribe Hes7 in this research. We generated knock-in mice, in which a large intron was inserted into Hes7 3′UTR. The exogenous intron was unexpectedly not properly spliced out and the transcripts were prematurely terminated. Consequently, Hes7 mRNA lost its 3′UTR, thereby reducing the amount of Hes7 protein. Oscillation was damped in the knock-in embryos and periodic somite segmentation does not occur properly. Thus, we demonstrated that Hes7 3′UTR is essential to accumulate adequate amounts of Hes7 protein for the somite segmentation clock that orchestrates periodic somite formation.
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